1. IF you do not turn in HW this week,
Warm-up
IF you do not turn in HW this week,
you will not do lbs next
Get out your homework.
Page 47 all
52 graphing and 53 all
DUE THURSDAY is your lab
DUE FRI
Keyterms
61 all
71 1-5

2. Solids Liquids and Gasses
Ch 2 Section 1
Solids Liquids and Gasses

3. 1. Solids
Fixed volume and shape
Atoms are close, but move
organized

4. a. Particles in a solid
As long as temp is above absolute zero , -273 C or 0 K, particles are moving

5. b. Types of solids
Crystalline solid-repeating molecular patterns. Lose crystal shape when melt.
Amorphous solid melting point not distinct, will flow over time, not crystals.

6. 2. Liquids
Take shape of container BUT volume is fixed, have ability to flow

7. a. Particles in a liquid
Packed almost as close as solid but will move freely___

8. Surface tension
Inward pull of molecules of a liquid that brings water (liquids)molecules closer.
Causes -meniscus in a cylinder and water strider to walk on water

9. Changes to Gas two ways Vaporization is to gas when BP is reached
Evaporation is to gas when surface molecules are released. DOES not reach BP

10. b. viscosity Because it is a fluid and can flow. It is viscous
Higher viscosity means __flows_NOT AS EASILY
10 W oil vs 60 W oil

11. 3. Gases Flows also, is is a FLUID
BUT BECAUSE volume and shape change it is now a gas.

12. Diagram of s,l,g

14. Not in book Newtonian Fluids
Also known as Colloidal Suspensions- made of both a solid and liquid. This shows characteristics of both solids and liquids.

15. Changes of state
As energy in creases OR decreases Kinetic energy of particles will change.
Colder= slower
Hotter= faster

16. melting
The temperature at which a solids particles move enough to break free from their fixed positions and become a liquid,
Freezing is the opposite, vibrations slow and positions become fixed

17. Vaporization Particles gain enough _energy_to form a gas
evaporation_- this takes place only on the SURFACE of a liquid
Boiling point- temperature at which liquid changes to gas below surface as well as on surface.
BP is depend on atomic structure

18. condensation
Occurs when a gas loses kinetic energy and becomes a liquid again

19. Sublimation
When a SOLIDS thermal energy increases so it goes directly to a GAS with NO liquid state.
_dry ice

20. Section 3 1. Measuring gasses Use volume, Pressure and temp.
PSI pounds Per square inch

21. Day 2 Notes Warm up Get your lab out to turn in.
In comp book, explain why a meniscus forms in a graduated cylinder.

22. a. Volume
Varies according to container

23. b. Temperature Dependent on average energy of gas
T measures _molecular motion or KE
At 20 *C about 500 m/S is speed of average gas 650 m/s in water

24. c. Pressure
pressure= Force in NEWTONS / Area in m2

25. 2. Relating pressure vs volume
__Boyles Law
as pressure is increased at a constant Temp. the volume of a gas decreases.
And as pressure is decreased the volume increases if temp remains constant

28. 3. Relating pressure vs Temperature
A. As temp goes up, molecules move more and pressure will increase.
B. IN action- tire pressure on cars, friction of road and tire increases temp. so pressure will rise. This can cause blow outs on weak tires.

29. 4. Relating Volume and Temp
A. Charles law---when temp of gas is increased at a constant pressure, its volume increases. And when the temp is decreased the volume decreases

30. b. Charles law in action
Basketball outside on a cold day vs a hot day. Or a balloon on a hot and cold day.